YUMQUA Y-10 Portable Finger Handheld 4D Wired USB Trackball Mouse for Left/ Right Handed Users(Black) Laptop Lovers

  Description: This Wired Trackball Mouse features dolphin shape design with left/right clickers, fit left and right handed users. Its unique shape makes it not need the table support. You can adjust your posture freely, even if you are sitting on sofa or lying down, you can also use it conveniently, especially when you are in the narrow space, like in the car,train or in the plane. Specific: Left button: Common operation Right button: Special function menu Trackball: Thumb roll the trackball to control the cursor Scroll wheel: back and forward Cable Length: Approx. 6.56 ft / 2m Resolution DPI: 400/600/800/1000 Compatible with: Windows 98/ 2000 / XP / VISTA / win 7/ Linux / Unix / Mac OS Mouse size: 11 X 6 X 5cm Mouse weight: 100G How to Use: Put your index or middle finger into the hole of this mouse. Control the track ball for moving cursor and press the right and left button with your thumb When using "Drag and Go" function, press the button in the hole of the mouse that has the same function as the left button of the common mouse Use the left button to lock the screen and then you can control the track ball to roll your screen freely Package Included: 1 X Wired trackball mouse FA & Q 1, All the mouse we sell have 3 months warranty, if you had any questions, please contact the seller(in the package) directly instead of Amazon customer service. 2,If the mouse movement becomes difficult, you may try to used some liquid wax to wiping it. Problem solved!